Hi,
Did you try this tutorial to setup the ownCloud client ?
http://cloud.zaclys.com/Installer-et-co ... d,p167,267
Which OS are you using ?
If you are behind a proxy, you need to setup the client this way :
In the network tab, please check the manually option and https. Then enter the IP and the proxy port.
If the problem persists after this, contact us through our contact page :
https://www.zaclys.com/Contact,99
And give your email or nickname. We'll check your configuration.